8. Loss per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Numerator:
Net loss (numerator for basic and diluted income per share)	$ 678	$ (302)	$ (1,192)	$ 238	$ (247)	$ (1,318)	$ (817)	$ (1,327)
Denominator:
Denominator for basic loss per share weighted average shares	12,505,096			12,696,273			12,518,587	12,725,793
Denominator
Denominator for diluted loss per share weighted average shares	12,517,493			12,709,057			12,518,587	12,725,793
Basic loss per share	$ .05			$ .02			$ (.07)	$ (.10)
Diluted loss per share	$ 0.05			$ 0.02			$ (0.07)	$ (0.10)